Detectorium.



H. GERNSBAGK.

DETEGTORIUM.

APPLICATION FILED IBB. 5, 1910.

961,855. Patented June 21,1910.

HUGO GEBNSBACK, F NEW YORK, N. Y.

nETEc'ronIm.

Application led February 5, 1910. Serial No. 542,207.

To all wwm 'it may concern:

Be it known that I HUGO GEaNsaAcx, a citizen of the United States, residing at New York, in the county of New York .and State of New York, have invented new and useful Im rovements in Detectoriums, of

which the ollowing is a specification.

This invention relates 4to the art of wireless telegraphy and telephony and has to deal more articularly with an instrument which I sha term a detectorium, the principal object of the invention being to com bine 1n a single instrument means for tuning the antenna and for acting as a detector for ordinary Hertzian waves.

Another object of the invention is to pro? I vide a slider of a tuning coil with a contact A illustrates one em odiment element which slides'over the convolutions of the coil in tuning the. antenna and which, by bearing on the coil, acts as a detector, the material best suitable for this being found by experiment to be silicon, althou h other 'materials of analogous nature may less receiving stationwith the combined tuner and detector included therein.

Similar reference characters are employed to designate corresponding parts throughout the several views.

Referring to the drawing, l designates the coil of the tuner, the same consisting of numerous turns of insulated wire mounted on a core or suitable support 2, and on the end ieces 3 of the core is a slider bar 4 that as a binding ost 5 for connecting it in circuit. .On the ar is a slider A which is movable longitudinally of the coil to engage any convolution thereof at the top of the coil where the convolutions are exposed in a line, which line corresponds to the path of the slider".l The slider consists of a metal ytube 6 inwhich is arranged-a bullet like detector 7, the lower end, which projects out of the tube, is round and highly polished where it engages the portions of 'the coil from which the insulation has been removed. The tube is mounted on a box or sleeve 8 which slides on the bar 4 and this sleeve is rovided with an insulating knob 9, wherey the slider A can be moved back and forth in .tuning the antenna. The detector 7, which is in effect a contact member between the slider and coil, is ,preferably made of silicon, although other materials such as carbon and graphite maybe used, but with these .latter materials a light microphonic contact is necessary in order to obtain the detector action, and the detector is pressed outwardly by means of a spring 10, which may be adjusted by a screw or equivalent device to obtain the desired degree of ressure with which the detector or `element bears on the tuning coil. The coil is provided with the usual binding posts 11 and 12 and in order to increase the range of the tunin coil, another slider B may be employed as is well known in the art, but it is not necessary for this slide to be equipped with the silicon contact element.

In'the diagram shown in Fig. 3, a represents the antenna connected by its wire 13 with the binding post 11 of the coil 1, and

engaging one of the convolutions of the coil vis the silicon tip slider A which is connected by a wire 14 with a receiving instrument such as a teleplhone receiver R or recording instruments, t e same being connected by a wire 15 with ground at 16, the other slider B being in engagement with another convolution of the tuning coil and connected by wire 17 ltolground. The silicon vresponds to Specioation ot Letters Patent. Patented J une 21, 1910.

Hertzien waves in such a manner as to take the place of the ordinary detector so that the circuits are greatly ,simplified and a single instrument takes the place of two separate instruments, namely, the tuning coil and the detector. i

From the fore oing description taken in connection with t e accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art tol which the invention relates, and While I have described t-he principle of operation of the invention, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative and that such changes may be made when desired as are within the scope of the claims. What I claim as new and desire to secure by Letters Patent is I 5 1. A wireless telegraph and'-,telephonetun 1 ing coil including a'movable contact elel ment of such material as to form a detector. 2. A tuning coil including a slider and 'a i detector element movable with the slider and l 1o enga ing the coil.

3. he combination of an antenna, a coil connected therewith, and a detector element movable along the coil, for tuning the 'antenna.

4. The combination oan antenna, a tuning coil connected therewith, a detector element movable along the coill for tuning the 1 in presence o antenna, and a grounded conductor conf nected with the detector and including a receiving instrument.

5. A slider for tuning coil tipped with a material coperating with the coil to form a detector. Y.

6. A slider for tuning coil, consisting of a tubular holder, a contact member of siliconhaving a polished coil engaging face, and means for pressing the element against the coil. f

In testimon 'whereof I ax my signature fy wo witnesses.

HU GD GERNSBACK. Witnesses:

A. `C. AUSTIN, Jr., Afp

y.' MORGAN. 

